1 files changed, 7 insertions, 0 deletions
diff --git a/builtins/datatypes.h b/builtins/datatypes.h
index b0f62d03..41a67a5e 100644
--- a/builtins/datatypes.h
+++ b/builtins/datatypes.h
@@ -4,6 +4,7 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include <pthread.h>
 
 #define ARRAY_LENGTH_BITS 42
 #define ARRAY_FREE_BITS 6
@@ -57,4 +58,10 @@ typedef struct Range_s {
     int64_t first, last, step;
 } Range_t;
 
+typedef struct {
+    array_t items;
+    pthread_mutex_t mutex;
+    pthread_cond_t cond;
+} channel_t;
+
 // vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0